Pipe-wrench



(No Model.)

J. C. BURGESS.

PIPE WRENCH. v No. 583,699. Patented June 1, 1897.

9 I I I I I awn/megs,

UNITED STATES PATENT OFFICE.

JAMES C. BURGESS, OF YOUNTSVILLE, INDIANA, ASSIGN OR TO TUNIS NADING, OFST. LOUIS CROSSING, INDIANA.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 583,699, dated June 1,1897.

Application filed April 30, 1896.

To all whmn it may concern:

Be it known that I, JAMES C. BURGESS, a citizen of the United States,and a resident of Yountsville, in the county of Montgomery and State ofIndiana, have invented certain new and useful Improvements inPipe-Wrenches; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specification.

My invention relates to improvements in pipe-wrenches in which themovable jaw, after it has been moved forward to clamp a pipe between itand the stationary jaw, can be made to tightly grip or clamp the pipe,so as to prevent the jaws from slipping thereon.

The invention consists, essentially, in a wrench comprising a shankhaving rack-teeth on one edge and a stationary serrated jaw at one end,a slidable sleeve having a block provided witha tooth adapted to engagewith said rack-teeth, a jaw pivoted to said slide and having teeth orserrations on the front side and a lug on the rear side, and a leveralso pivoted to said slide, provided with a head formed with a curvedrecess, with which said lug engages, as hereinafter fully described andclaimed.

In the accompanying drawings, Figure 1 is a side elevation of apipe-wrench constructed in accordance with my invention. Fig. 2 is alongitudinal section of the same. Fig. 3 is a cross-section on the lineas m, Fig. 2.

In the said drawings the reference-num'eral 1 designates the shank orhandle of the wrench, provided on its inner edge with a number ofrack-teeth 2 and at its outer end formed with a stationary jaW 3, theinner side of which is formed with a recess in which is seated aserrated block 5, held in place by a transverse rivet 4.

The numeral 6 designates a slide consisting of a metal plate bent overat the center and cut away at the bent-over portion, as seen at 7,forming walls 8. These walls at the rear end are connected together byablock 9, pro vided with a tooth 10, adapted to engage with the teeth ofthe shank. At the opposite end Serial No. 589,635. (No model.)

the said sides are connected by a rivet 12, which forms the pivot for ajaw 13, having teeth or serrations 14 on its front side or edge isbeveled, as seen in Fig. 2, to form a space I for the lower lug of thelever hereinafter described to work in. The space between the said. jawand block and the inner surface or side of the bent portion of the slideforms a way for the shank of the wrench. Pivoted to a pin 16, secured tothe side of the slide, near the lower edges thereof, isalever 17,provided with a head 18, formed with a rounded recess 19, forming twolugs 19, with which the lug of the pivoted jaw engages.

The numeral 20 designatesa set-screw passing through the bent portion ofthe slide near the rear end and is adapted to bear against the shank, soas to force the teeth of the same into engagement with the tooth of theblock.

The manner of using the wrench is as follows: The slide is slipped onthe shank, which passes between the inner side of the bent portion ofthe former and the block and pivoted jaw. The teeth of the stationaryjaw are then engaged with the pipe to be grasped and the slide slippedforward, so that the teeth thereof will also engage with the pipe, andthe set-screw is tightened, so that the tooth of the block will engagewith one of the teeth of the shank and thus hold the slide in place. Thepipe will now be grasped between the two jaws, but not sufficientlytight for any practical purpose. To cause the pipe to be tightly clampedby the jaws, the lever is forced toward the shank, when the recessedhead engaging with the lug of the pivoted jaw will cause'the latter tobe forced tightly against the pipe and the pipe be firmly grasped bysaid jaw.

By the above construction the slide can be quickly adjusted .to pipes ofvarying diameters and the pipe firmly and tightly grasped or clampedbetween the jaws by the lever actuating the pivoted jaw.

Having thus fully described my invention, what I claim is- In apipe-wrench, the combination with the shank having rack-teeth on itsinner edge and formed with a stationary jaw at the outer end having arecess in its inner side, a serrated block seated in said recess and thetransverse rivet, of the slide consisting of the metal plate bent overat the center forming two parallel sides and cut away between the ends,the rivets connecting said sides and lying in different vertical andhorizontal planes, the connecting-block formed with a tooth, theserrated jaw pivoted to one of said rivets, having its rear side beveledand formed with a rounded lug, the lever pivoted to the other rivetformed with a rounded recess and two lugs and the set'serew passingthrough the slide, substantially as described.

In testimony that I claim the foregoing as my own- I have hereuntoaffixed my signature in presence of two witnesses.

JAMES C. BURGESS. lVitnesses:

R. S. FULTON, HENRY Woosr.

